<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item>
        首页
      </el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">
            添加角色
          </el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table
        :data="rolelist"
        border
        stripe
      >
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRgihtsById(scope.row, item1.id)"
                >
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right" />
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过佛如循环 渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRgihtsById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right" />
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning "
                      v-for="item3 in item2.children "
                      :key="item3.id"
                      closable
                      @close="removeRgihtsById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" />
        <el-table-column
          label="角色名称"
          prop="roleName"
        />
        <el-table-column
          label="角色描述"
          prop="roleDesc"
        />
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-search"
            >
              编辑
            </el-button>
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
            >
              删除
            </el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightsDialog(scope.row)"
            >
              分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <el-dialog
      title="分配权限"
      :visible.sync="setRightsDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 内容部分 -->
      <span>
        <el-tree
          :data="rightslist"
          :props="defaultProps"
          show-checkbox
          node-key="id"
          default-expand-all
          :default-checked-keys="defKeys"
          ref="treeRef"
        />
      </span>
      <!-- 脚部 -->
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="allotRights"
        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data: function () {
    return {
      // 角色列表数据
      rolelist: [],
      // 控制分配权限对话框显示与隐藏
      setRightsDialogVisible: false,
      // 权限的数据
      rightslist: [],
      // 树形控件 属性绑定对象
      defaultProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      // 即将要分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 监听分配权限对话框关闭时间
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 展示分配权限对话框
    async showSetRightsDialog (role) {
      this.roleId = role.id
      // 获取权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败')
      }
      // 把权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)
      this.getLeafKeys(role, this.defKeys)
      this.setRightsDialogVisible = true
    },
    // 根据id删除对应权限
    async removeRgihtsById (role, rsid) {
      // 弹框提示
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rsid}`)
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除成功')
      // this.getRolesList()
      role.children = res.data
    },
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 通过递归获取三级权限的id 并且保存到drfkeys数组
    getLeafKeys (node, arr) {
    // 如果不包含children属性 则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 分配权限
    async allotRights () {
      const keys = [this.$refs.treeRef.getCheckedKeys(), this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, {
        rids: idStr
      })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.getRolesList()
      this.$message.success('分配成功')
      this.setRightsDialogVisible = false
    }
  }

}
</script>

<style scoped lang="less">
.el-tag {
    margin: 7px
}

.bdtop {
    border-top: 1px solid #eeeeee
}
.bdbottom {
    border-bottom: 1px solid #eee
}
.vcenter {
    display: flex;
    align-items: center
}
</style>
